Note
Go to the end to download the full example code
Ship drift
from datetime import datetime
from opendrift.models.shipdrift import ShipDrift
o = ShipDrift(loglevel=20)
o.add_readers_from_list([
'https://thredds.met.no/thredds/dodsC/cmems/topaz6/dataset-topaz6-arc-15min-3km-be.ncml',
'https://thredds.met.no/thredds/dodsC/mepslatest/meps_lagged_6_h_latest_2_5km_latest.nc',
'https://thredds.met.no/thredds/dodsC/cmems/mywavewam3km/dataset-wam-arctic-1hr3km-be.ncml'
])
13:59:57 INFO opendrift.models.basemodel:539: OpenDriftSimulation initialised (version 1.10.7 / v1.10.6-119-g1da5bec)
Seed ship elements at defined position and time Note: beam/length ratio is larger than allowed, but is then clipped internally
o.seed_elements(lon=5.0, lat=63.0, radius=1000, number=1000,
time=datetime.utcnow(),
length=80.0, beam=20.0, height=9.0, draft=4.0)
13:59:57 WARNING opendrift.models.shipdrift:179: Ratio of beam to length should be in range 0.12 to 0.18, given range is 0.25-0.25. Using border value.
Running model
o.run(steps=24, stop_on_error=True)
13:59:57 INFO opendrift.models.basemodel:2591: Fallback values will be used for the following variables which have no readers:
13:59:57 INFO opendrift.models.basemodel:2594: sea_surface_wave_stokes_drift_x_velocity: 0.000000
13:59:57 INFO opendrift.models.basemodel:2594: sea_surface_wave_stokes_drift_y_velocity: 0.000000
13:59:57 INFO opendrift.models.basemodel:2594: sea_surface_wave_significant_height: 0.000000
13:59:57 INFO opendrift.models.basemodel:2594: sea_surface_wave_mean_period_from_variance_spectral_density_second_frequency_moment: 0.000000
13:59:57 INFO opendrift.models.basemodel:2753: Adding a dynamical landmask with max. priority based on assumed maximum speed of 2 m/s. Adding a customised landmask may be faster...
14:00:03 INFO opendrift.models.basemodel:1701: Using existing reader for land_binary_mask
14:00:03 INFO opendrift.models.basemodel:1713: All points are in ocean
14:00:03 INFO opendrift.models.basemodel:2882: 2023-09-01 13:59:57.525278 - step 1 of 24 - 1000 active elements (0 deactivated)
14:00:03 INFO opendrift.readers.reader_netCDF_CF_generic:92: Opening dataset: https://thredds.met.no/thredds/dodsC/cmems/topaz6/dataset-topaz6-arc-15min-3km-be.ncml
/opt/conda/envs/opendrift/lib/python3.11/site-packages/pyproj/crs/crs.py:1286: UserWarning: You will likely lose important projection information when converting to a PROJ string from another format. See: https://proj.org/faq.html#what-is-the-best-format-for-describing-coordinate-reference-systems
proj = self._crs.to_proj4(version=version)
14:00:05 INFO opendrift.readers.reader_netCDF_CF_generic:92: Opening dataset: https://thredds.met.no/thredds/dodsC/mepslatest/meps_lagged_6_h_latest_2_5km_latest.nc
/opt/conda/envs/opendrift/lib/python3.11/site-packages/pyproj/crs/crs.py:1286: UserWarning: You will likely lose important projection information when converting to a PROJ string from another format. See: https://proj.org/faq.html#what-is-the-best-format-for-describing-coordinate-reference-systems
proj = self._crs.to_proj4(version=version)
14:00:07 INFO opendrift.readers.reader_netCDF_CF_generic:92: Opening dataset: https://thredds.met.no/thredds/dodsC/cmems/mywavewam3km/dataset-wam-arctic-1hr3km-be.ncml
/opt/conda/envs/opendrift/lib/python3.11/site-packages/pyproj/crs/crs.py:1286: UserWarning: You will likely lose important projection information when converting to a PROJ string from another format. See: https://proj.org/faq.html#what-is-the-best-format-for-describing-coordinate-reference-systems
proj = self._crs.to_proj4(version=version)
14:00:17 WARNING opendrift.readers.interpolation.structured:46: Ensemble data currently not extrapolated towards seafloor
14:00:17 WARNING opendrift.readers.interpolation.structured:46: Ensemble data currently not extrapolated towards seafloor
14:00:18 WARNING opendrift.readers.interpolation.structured:46: Ensemble data currently not extrapolated towards seafloor
14:00:18 WARNING opendrift.readers.interpolation.structured:46: Ensemble data currently not extrapolated towards seafloor
14:00:20 INFO opendrift.models.shipdrift:309: Using Stokes drift direction as wave direction
14:00:20 INFO opendrift.models.basemodel:2882: 2023-09-01 14:59:57.525278 - step 2 of 24 - 1000 active elements (0 deactivated)
14:00:22 WARNING opendrift.readers.interpolation.structured:46: Ensemble data currently not extrapolated towards seafloor
14:00:22 WARNING opendrift.readers.interpolation.structured:46: Ensemble data currently not extrapolated towards seafloor
14:00:23 INFO opendrift.models.shipdrift:309: Using Stokes drift direction as wave direction
14:00:23 INFO opendrift.models.basemodel:2882: 2023-09-01 15:59:57.525278 - step 3 of 24 - 1000 active elements (0 deactivated)
14:00:24 WARNING opendrift.readers.interpolation.structured:46: Ensemble data currently not extrapolated towards seafloor
14:00:24 WARNING opendrift.readers.interpolation.structured:46: Ensemble data currently not extrapolated towards seafloor
14:00:25 INFO opendrift.models.shipdrift:309: Using Stokes drift direction as wave direction
14:00:25 INFO opendrift.models.basemodel:2882: 2023-09-01 16:59:57.525278 - step 4 of 24 - 1000 active elements (0 deactivated)
14:00:27 WARNING opendrift.readers.interpolation.structured:46: Ensemble data currently not extrapolated towards seafloor
14:00:27 WARNING opendrift.readers.interpolation.structured:46: Ensemble data currently not extrapolated towards seafloor
14:00:27 INFO opendrift.models.shipdrift:309: Using Stokes drift direction as wave direction
14:00:27 INFO opendrift.models.basemodel:2882: 2023-09-01 17:59:57.525278 - step 5 of 24 - 1000 active elements (0 deactivated)
14:00:29 WARNING opendrift.readers.interpolation.structured:46: Ensemble data currently not extrapolated towards seafloor
14:00:29 WARNING opendrift.readers.interpolation.structured:46: Ensemble data currently not extrapolated towards seafloor
14:00:30 INFO opendrift.models.shipdrift:309: Using Stokes drift direction as wave direction
14:00:30 INFO opendrift.models.basemodel:2882: 2023-09-01 18:59:57.525278 - step 6 of 24 - 1000 active elements (0 deactivated)
14:00:31 WARNING opendrift.readers.interpolation.structured:46: Ensemble data currently not extrapolated towards seafloor
14:00:31 WARNING opendrift.readers.interpolation.structured:46: Ensemble data currently not extrapolated towards seafloor
14:00:32 INFO opendrift.models.shipdrift:309: Using Stokes drift direction as wave direction
14:00:32 INFO opendrift.models.basemodel:2882: 2023-09-01 19:59:57.525278 - step 7 of 24 - 1000 active elements (0 deactivated)
14:00:33 WARNING opendrift.readers.interpolation.structured:46: Ensemble data currently not extrapolated towards seafloor
14:00:33 WARNING opendrift.readers.interpolation.structured:46: Ensemble data currently not extrapolated towards seafloor
14:00:34 INFO opendrift.models.shipdrift:309: Using Stokes drift direction as wave direction
14:00:34 INFO opendrift.models.basemodel:2882: 2023-09-01 20:59:57.525278 - step 8 of 24 - 1000 active elements (0 deactivated)
14:00:36 WARNING opendrift.readers.interpolation.structured:46: Ensemble data currently not extrapolated towards seafloor
14:00:36 WARNING opendrift.readers.interpolation.structured:46: Ensemble data currently not extrapolated towards seafloor
14:00:36 INFO opendrift.models.shipdrift:309: Using Stokes drift direction as wave direction
14:00:36 INFO opendrift.models.basemodel:2882: 2023-09-01 21:59:57.525278 - step 9 of 24 - 1000 active elements (0 deactivated)
14:00:38 WARNING opendrift.readers.interpolation.structured:46: Ensemble data currently not extrapolated towards seafloor
14:00:38 WARNING opendrift.readers.interpolation.structured:46: Ensemble data currently not extrapolated towards seafloor
14:00:39 INFO opendrift.models.shipdrift:309: Using Stokes drift direction as wave direction
14:00:39 INFO opendrift.models.basemodel:2882: 2023-09-01 22:59:57.525278 - step 10 of 24 - 1000 active elements (0 deactivated)
14:00:40 WARNING opendrift.readers.interpolation.structured:46: Ensemble data currently not extrapolated towards seafloor
14:00:40 WARNING opendrift.readers.interpolation.structured:46: Ensemble data currently not extrapolated towards seafloor
14:00:41 INFO opendrift.models.shipdrift:309: Using Stokes drift direction as wave direction
14:00:41 INFO opendrift.models.basemodel:2882: 2023-09-01 23:59:57.525278 - step 11 of 24 - 1000 active elements (0 deactivated)
14:00:43 WARNING opendrift.readers.interpolation.structured:46: Ensemble data currently not extrapolated towards seafloor
14:00:43 WARNING opendrift.readers.interpolation.structured:46: Ensemble data currently not extrapolated towards seafloor
14:00:44 INFO opendrift.models.shipdrift:309: Using Stokes drift direction as wave direction
14:00:44 INFO opendrift.models.basemodel:2882: 2023-09-02 00:59:57.525278 - step 12 of 24 - 1000 active elements (0 deactivated)
14:00:45 WARNING opendrift.readers.interpolation.structured:46: Ensemble data currently not extrapolated towards seafloor
14:00:45 WARNING opendrift.readers.interpolation.structured:46: Ensemble data currently not extrapolated towards seafloor
14:00:46 INFO opendrift.models.shipdrift:309: Using Stokes drift direction as wave direction
14:00:46 INFO opendrift.models.basemodel:2882: 2023-09-02 01:59:57.525278 - step 13 of 24 - 1000 active elements (0 deactivated)
14:00:48 WARNING opendrift.readers.interpolation.structured:46: Ensemble data currently not extrapolated towards seafloor
14:00:48 WARNING opendrift.readers.interpolation.structured:46: Ensemble data currently not extrapolated towards seafloor
14:00:48 INFO opendrift.models.shipdrift:309: Using Stokes drift direction as wave direction
14:00:48 INFO opendrift.models.basemodel:2882: 2023-09-02 02:59:57.525278 - step 14 of 24 - 1000 active elements (0 deactivated)
14:00:50 WARNING opendrift.readers.interpolation.structured:46: Ensemble data currently not extrapolated towards seafloor
14:00:50 WARNING opendrift.readers.interpolation.structured:46: Ensemble data currently not extrapolated towards seafloor
14:00:51 INFO opendrift.models.shipdrift:309: Using Stokes drift direction as wave direction
14:00:51 INFO opendrift.models.basemodel:2882: 2023-09-02 03:59:57.525278 - step 15 of 24 - 1000 active elements (0 deactivated)
14:00:52 WARNING opendrift.readers.interpolation.structured:46: Ensemble data currently not extrapolated towards seafloor
14:00:52 WARNING opendrift.readers.interpolation.structured:46: Ensemble data currently not extrapolated towards seafloor
14:00:53 INFO opendrift.models.shipdrift:309: Using Stokes drift direction as wave direction
14:00:53 INFO opendrift.models.basemodel:2882: 2023-09-02 04:59:57.525278 - step 16 of 24 - 1000 active elements (0 deactivated)
14:00:55 WARNING opendrift.readers.interpolation.structured:46: Ensemble data currently not extrapolated towards seafloor
14:00:55 WARNING opendrift.readers.interpolation.structured:46: Ensemble data currently not extrapolated towards seafloor
14:00:56 INFO opendrift.models.shipdrift:309: Using Stokes drift direction as wave direction
14:00:56 INFO opendrift.models.basemodel:2882: 2023-09-02 05:59:57.525278 - step 17 of 24 - 1000 active elements (0 deactivated)
14:00:57 WARNING opendrift.readers.interpolation.structured:46: Ensemble data currently not extrapolated towards seafloor
14:00:57 WARNING opendrift.readers.interpolation.structured:46: Ensemble data currently not extrapolated towards seafloor
14:00:58 INFO opendrift.models.shipdrift:309: Using Stokes drift direction as wave direction
14:00:58 INFO opendrift.models.basemodel:2882: 2023-09-02 06:59:57.525278 - step 18 of 24 - 1000 active elements (0 deactivated)
14:01:00 WARNING opendrift.readers.interpolation.structured:46: Ensemble data currently not extrapolated towards seafloor
14:01:00 WARNING opendrift.readers.interpolation.structured:46: Ensemble data currently not extrapolated towards seafloor
14:01:00 INFO opendrift.models.shipdrift:309: Using Stokes drift direction as wave direction
14:01:00 INFO opendrift.models.basemodel:2882: 2023-09-02 07:59:57.525278 - step 19 of 24 - 1000 active elements (0 deactivated)
14:01:02 WARNING opendrift.readers.interpolation.structured:46: Ensemble data currently not extrapolated towards seafloor
14:01:02 WARNING opendrift.readers.interpolation.structured:46: Ensemble data currently not extrapolated towards seafloor
14:01:03 INFO opendrift.models.shipdrift:309: Using Stokes drift direction as wave direction
14:01:03 INFO opendrift.models.basemodel:2882: 2023-09-02 08:59:57.525278 - step 20 of 24 - 1000 active elements (0 deactivated)
14:01:05 WARNING opendrift.readers.interpolation.structured:46: Ensemble data currently not extrapolated towards seafloor
14:01:05 WARNING opendrift.readers.interpolation.structured:46: Ensemble data currently not extrapolated towards seafloor
14:01:05 INFO opendrift.models.shipdrift:309: Using Stokes drift direction as wave direction
14:01:05 INFO opendrift.models.basemodel:2882: 2023-09-02 09:59:57.525278 - step 21 of 24 - 1000 active elements (0 deactivated)
14:01:07 WARNING opendrift.readers.interpolation.structured:46: Ensemble data currently not extrapolated towards seafloor
14:01:07 WARNING opendrift.readers.interpolation.structured:46: Ensemble data currently not extrapolated towards seafloor
14:01:08 INFO opendrift.models.shipdrift:309: Using Stokes drift direction as wave direction
14:01:08 INFO opendrift.models.basemodel:2882: 2023-09-02 10:59:57.525278 - step 22 of 24 - 1000 active elements (0 deactivated)
14:01:09 WARNING opendrift.readers.interpolation.structured:46: Ensemble data currently not extrapolated towards seafloor
14:01:09 WARNING opendrift.readers.interpolation.structured:46: Ensemble data currently not extrapolated towards seafloor
14:01:10 INFO opendrift.models.shipdrift:309: Using Stokes drift direction as wave direction
14:01:10 INFO opendrift.models.basemodel:2882: 2023-09-02 11:59:57.525278 - step 23 of 24 - 1000 active elements (0 deactivated)
14:01:12 WARNING opendrift.readers.interpolation.structured:46: Ensemble data currently not extrapolated towards seafloor
14:01:12 WARNING opendrift.readers.interpolation.structured:46: Ensemble data currently not extrapolated towards seafloor
14:01:13 INFO opendrift.models.shipdrift:309: Using Stokes drift direction as wave direction
14:01:13 INFO opendrift.models.basemodel:2882: 2023-09-02 12:59:57.525278 - step 24 of 24 - 1000 active elements (0 deactivated)
14:01:15 WARNING opendrift.readers.interpolation.structured:46: Ensemble data currently not extrapolated towards seafloor
14:01:15 WARNING opendrift.readers.interpolation.structured:46: Ensemble data currently not extrapolated towards seafloor
14:01:16 INFO opendrift.models.shipdrift:309: Using Stokes drift direction as wave direction
Print and plot results
print(o)
o.plot(linecolor='orientation')
#o.animation(color='orientation', markersize=20, filename="orientation.gif", legend=['left','right'],colorbar=False,cmap='bwr')
o.animation(color='orientation', legend=['left','right'], markersize=20, colorbar=False, cmap='bwr')
===========================
--------------------
Reader performance:
--------------------
global_landmask
0:00:00.0 total
0:00:00.0 preparing
0:00:00.0 reading
0:00:00.0 masking
--------------------
https://thredds.met.no/thredds/dodsC/cmems/topaz6/dataset-topaz6-arc-15min-3km-be.ncml
0:00:18.0 total
0:00:00.0 preparing
0:00:17.9 reading
0:00:00.0 interpolation
0:00:00.0 interpolation_time
0:00:00.0 rotating vectors
0:00:00.0 masking
--------------------
https://thredds.met.no/thredds/dodsC/mepslatest/meps_lagged_6_h_latest_2_5km_latest.nc
0:00:24.1 total
0:00:00.0 preparing
0:00:23.9 reading
0:00:00.2 interpolation
0:00:00.0 interpolation_time
0:00:00.2 rotating vectors
0:00:00.0 masking
--------------------
https://thredds.met.no/thredds/dodsC/cmems/mywavewam3km/dataset-wam-arctic-1hr3km-be.ncml
0:00:17.3 total
0:00:00.0 preparing
0:00:17.1 reading
0:00:00.0 interpolation
0:00:00.0 interpolation_time
0:00:00.1 rotating vectors
0:00:00.0 masking
--------------------
Performance:
1:18.9 total time
0.1 configuration
5.5 preparing main loop
5.5 making dynamical landmask
0.0 moving elements to ocean
1:12.4 readers
0.0 global_landmask
0.0 postprocessing
1:13.1 main loop
18.0 https://thredds.met.no/thredds/dodsC/cmems/topaz6/dataset-topaz6-arc-15min-3km-be.ncml
24.1 https://thredds.met.no/thredds/dodsC/mepslatest/meps_lagged_6_h_latest_2_5km_latest.nc
17.3 https://thredds.met.no/thredds/dodsC/cmems/mywavewam3km/dataset-wam-arctic-1hr3km-be.ncml
0.5 updating elements
0.0 cleaning up
--------------------
===========================
Model: ShipDrift (OpenDrift version 1.10.7)
1000 active ShipObject particles (0 deactivated, 0 scheduled)
-------------------
Environment variables:
-----
land_binary_mask
1) global_landmask
-----
x_sea_water_velocity
y_sea_water_velocity
1) https://thredds.met.no/thredds/dodsC/cmems/topaz6/dataset-topaz6-arc-15min-3km-be.ncml
2) https://thredds.met.no/thredds/dodsC/cmems/mywavewam3km/dataset-wam-arctic-1hr3km-be.ncml
-----
x_wind
y_wind
1) https://thredds.met.no/thredds/dodsC/mepslatest/meps_lagged_6_h_latest_2_5km_latest.nc
-----
sea_surface_wave_mean_period_from_variance_spectral_density_second_frequency_moment
sea_surface_wave_significant_height
sea_surface_wave_stokes_drift_x_velocity
sea_surface_wave_stokes_drift_y_velocity
1) https://thredds.met.no/thredds/dodsC/cmems/mywavewam3km/dataset-wam-arctic-1hr3km-be.ncml
Time:
Start: 2023-09-01 13:59:57.525278 UTC
Present: 2023-09-02 13:59:57.525278 UTC
Calculation steps: 24 * 1:00:00 - total time: 1 day, 0:00:00
Output steps: 25 * 1:00:00
===========================
0.3984006735749549 ALPHA
14:01:43 INFO opendrift.models.basemodel:5350: Saving animation to /root/project/docs/source/gallery/animations/example_shipdrift_0.gif...
14:02:55 INFO opendrift.models.basemodel:3848: Time to make animation: 0:01:14.614224
Total running time of the script: (3 minutes 2.079 seconds)